robots.txt !!!

hola. bueno, el problema es que no tengo un robots.txt y la verdad, no entiendo mucho de SEO, y no se que es bueno y que no permitir indexar. buscando un poco, me tope con el robots de vbhispano:

Código:

# Permitir Archiver
User-agent: ia_archiver
Allow: /
Allow: /foros/

User-agent: *
Disallow: *.js
Disallow: *.jsp
Disallow: *.cfm
Disallow: *.asp
Disallow: *.aspx
Disallow: *.cgi
Disallow: /boletines/
Disallow: /descargas/
Disallow: /directorio/
Disallow: /docs/
Disallow: /livezilla/
Disallow: /trans/
Disallow: /vietvbb/
Disallow: /w/
Disallow: /foros/archive/
Disallow: /foros/calendar/
Disallow: /foros/clientscript/
Disallow: /foros/cpstyles/
Disallow: /foros/customavatars/
Disallow: /foros/customgroupicons/
Disallow: /foros/customprofilepics/
Disallow: /foros/faq/
Disallow: /foros/gfx4_v4GFXed/
Disallow: /foros/images/
Disallow: /foros/includes/
Disallow: /foros/install/
Disallow: /foros/lytebox/
Disallow: /foros/microsupport/
Disallow: /foros/mobiquo/
Disallow: /foros/multimedia/
Disallow: /foros/normas/
Disallow: /foros/packages/
Disallow: /foros/projectadjuntos/
Disallow: /foros/signaturepics/
Disallow: /foros/vb/
Disallow: /foros/vbadjuntos/
Disallow: /foros/vbseo/
Disallow: /foros/vietvbb/
Disallow: /foros/xc/
Disallow: /foros/ajax.php
Disallow: /foros/album.php
Disallow: /foros/announcement.php
Disallow: /foros/asset.php
Disallow: /foros/assetmanage.php
Disallow: /foros/attachment_inlinemod.php
Disallow: /foros/blog_ajax.php
Disallow: /foros/blog_attachment.php
Disallow: /foros/blog_inlinemod.php
Disallow: /foros/blog_report.php
Disallow: /foros/blog_search.php
Disallow: /foros/blog_suscription.php
Disallow: /foros/blog_usercp.php
Disallow: /foros/buscar.php
Disallow: /foros/calendar.php
Disallow: /foros/converse.php
Disallow: /foros/cron.php
Disallow: /foros/css.php
Disallow: /foros/editor.php
Disallow: /foros/editpost.php
Disallow: /foros/external.php
Disallow: /foros/faq.php
Disallow: /foros/global.php
Disallow: /foros/group_inlinemod.php
Disallow: /foros/groupsubscription.php
Disallow: /foros/image.php
Disallow: /foros/infraction.php
Disallow: /foros/inlinemod.php
Disallow: /foros/joinrequests.php
Disallow: /foros/login.php
Disallow: /foros/member.php
Disallow: /foros/member_inlinemod.php
Disallow: /foros/memberlist.php
Disallow: /foros/misc.php
Disallow: /foros/moderation.php
Disallow: /foros/moderator.php
Disallow: /foros/newattachment.php
Disallow: /foros/newreply.php
Disallow: /foros/newthread.php
Disallow: /foros/online.php
Disallow: /foros/payment_gateway.php
Disallow: /foros/payments.php
Disallow: /foros/picture_inlinemod.php
Disallow: /foros/picturecomment.php
Disallow: /foros/poll.php
Disallow: /foros/posthistory.php
Disallow: /foros/postings.php
Disallow: /foros/printthread.php
Disallow: /foros/private.php
Disallow: /foros/profile.php
Disallow: /foros/projectajax.php
Disallow: /foros/projectmilestone.php
Disallow: /foros/projectpost.php
Disallow: /foros/projectsearch.php
Disallow: /foros/receiver.php
Disallow: /foros/register.php
Disallow: /foros/report.php
Disallow: /foros/reputation.php
Disallow: /foros/rules.php
Disallow: /foros/search.php
Disallow: /foros/sendmessage.php
Disallow: /foros/showgroups.php
Disallow: /foros/suscription.php
Disallow: /foros/threadrate.php
Disallow: /foros/threadtag.php
Disallow: /foros/usercp.php
Disallow: /foros/usernote.php
Disallow: /foros/vbseo.php
Disallow: /foros/vbseocp.php
Disallow: /foros/visitormessage.php
Disallow: /foros/widget.php
Disallow: /foros/xmlsitemap.php

Sitemap: http://www.vbhispano.com/foros/sitemap_index.xml.gz

Ahora mi pregunta es, ¿como hago un robots.txt?
¿Puedo usar el mismo de vbhispano, pero cambiando las rutas?
¿O que tengo que hacer para conseguir uno?

Agrego que uso vbseo.