Get yourself an itemtype.dat decrypring tool, which can be found here on epvp. Decrypt the itemtype.dat, and copy those items to the item.ini that you want to pick up.
It doesn't have to be like
10900020 Gold
for example, if you leave the whole line like it is in the itemtype.dat file, it will work as well (saves some work).
Be careful when picking up everything though. I stopped my bot to drop stuff, but the coordinated in proxy and client differed, which gave my poor botting noob a free trip to botjail

My bad.