i know if you find golden pantaloons in BG1, silver pantaloons in BG2, and bronze pantalettes in ToB, and then give them to Cespenar, he should make a strange machine that has many parts. Those things do everything nice, shoot grenades etc. But where can I find pantaloons in BG2? Has anyone made that thing? :)

The pantaloons in BG2 are the ransom for Lady Elgea. If you've found the man buried alive in the Grave district, you'll be able to follow the clues (I'll leave the details up to you ;) ) back to the kidnappers. Once they've been dealt with, you'll be able to find Lady Elgea upstairs (hint: a lot of people miss the stairs!) and you'll have the option either to free her or collect the ransom yourself (ensure to search thoroughly to find the ransom note - that'll tell you what to do). Collecting the ransom will give you the Silver Pantaloons and -2 Reputation, which you may not want if you're good.

Hope that helps! :)

First of all it isn't Ceaspenar who combines the pantaloons (it's a dwarf or gnome in Amkethran). The 'someone was burried alive' quest will ake you to a house in the dócks. Upstairs is a hostage. for a -2 rep penalty you can keep her hostage yourself, and collect the ransom which is the silver pantaloons. Do the quest and you'llknow what to do (go to the graveyard in Ahtkatla, and manipulate the manipulatative grave next to the entrance to Bhodis lair (the open grave next to the door next to Bodhi's lair).

NOTE; Hope this wasn't confusing :p my keyboard is in an akward position due to me drawing, thus using most of my table. Moreover I wrote the way too fast...

Check out the Big Metal Unit Guide (http://www.planetbaldursgate.com/bg2/walkthrough/bmu/) at PBG.