just like the tile, i can't find the Dunnyman in act II and the only thing i can do is, to play the game but the follow the correct order in the walkthru, i have given the note to the barber and get all the other golden materials from the following parts......

An other thing is after i have traveled from the past by talking to bigsally and give all the things in need, when i come back by L-space in act II, there are something devil and monster playing 21 card game with the Death......
the library look like space and rincewinds is grey in colour hiding behind the bookshelf in the library......a girl playing card game ask one of the monsters about the pencil-head(thats rincewinds)but the monster didn't care......rincewind will only go back to the past again(i have tried many times)....... but if i play the saved file and play back all the parts once again, i can go to present without this short, it sounds interesting but i really feel scared.

I have noticed this too and I'm pretty certain it's a glitch. If you take the Dragon Summoning book with you into L-Space, you will keep returning to the past. Make sure you save just after you have the Custard book and have entered the hole. That's exactly where I am.

I have only just got and started playing the game for the first time a few days ago.

In regards to the dunnyman, he is in the alleyway just behind Dibbler.

Get a donut from Dibbler and give it to the dunnyman. Next visit the milkmaid again and get a letter from her to give to the the barber. After you have given the note to him use the apparatus on the Dunnyman to get the gold tooth.