Thanks for the reply Waldronate. It seems that after waiting for about 2mins, the program finally responds and I can enter variables. Thanks too for the link. I have been there from the start as it is part of the tut (Chucks' atlas style) that I was working through. A bit annoying with the "not responding" thing but as long as it eventually works I can use it. If I have any more hassles I'll try to get some screen shots etc up.

Thanks again.