[gb2world]

If you are going to want to make template modifications on your own - you are really handicapping yourself by not using the tools available (webmastermode and firebug are essential). I keep a "sandbox" non production cart available so I can try things without worrying about hurting anything. You'll need to be fearless in order to come up that learning curve!

You might also consider posting links - it makes it easier for people to help you.

One thing I can see that would cause problems is if you are using the same name for two forms:
name="form_manuf"
onchange="document.form_manuf.submit()

The onchange might be confused about what to do with 2 forms with the same name.

You could try changing the second form to:
name="form_manuf_b"
onchange="document.form_manuf_b.submit()

Maybe to help with the SEO issue Steve is advising you on - you should try and think of a way the spiders can still crawl your manufacturers. I think there are sliders built with css so you could still have all your links there - but the display could take up less space. Also - maybe if you have a link to an html site map, it could help with the problem.

---