Firstly, don't post three seperate topics for each question. Put all your questions in one topic. Its a pointless waste of bandwidth and forum space.
.rar files can be open with Winrar, a better version of Winzip (but i'd still suggest holding onto winzip). Google it and it'll give you a free trial thats only meant to last 40 days but lasts forever.
About your other 2 questions.
There's a search function at the bottom of the every page, use it to find what ever you need. I believe several people have made tiolets and i think someone made a dog but no cats as far as i am aware.
See, i flamed but i helped at the same time; i'm a model citizen...
AE