http://www.gis.net/~yos/

This site has cool custom items, spells, kits etc. but I do not know how to install these. Site says I need Infinity Engine (?) from teambg.com but I can not open the site.

So how can I install these, and as they are non-weidu will they bug my heavily-modded game? Do you reccomend these? Has anyone used them? (I want that cool ice arrow spell!)

TeamBG is long dead and burried; you can, however, find most of their tools here: http://www.clandlan.net/index.php?page=modding/bgiwd/tbgmirror

Thanks Olim! But should I install these and probably risk bugging my perfectly installed BG2? Has anyone installed these and encountered bugs?

i think you can find similar mods, or even the exact same other places on the interenet just do a search on google or right here on SP