Thanks Jaz, useful info, will try your suggestions to see if they fix the problems I'm having with Hammer. Improving the appearance is what I was trying to achieve with my chambers, just finding Hammers not very user friendly.

I took Star Wars Death Star Approach map and added to it in the Hammer (my first successful use of the Hammer). It took a lot of learning from the help files and some help from karl.kenner. It's still the same puzzle, just improved the appearance. I still couldn't get the Music into it. Also Hammer causes glitches with Portal 2, so if you attempt using it, make sure you know how to go into properties and verify game cache to correct the errors back.
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=85795627

Thanks for the feedback, the walking movement was the tough part, originally this AT-AT was walking like a muppet, after the last Portal update it started to walk faster. The R2-D2 ball never stays where I put it, it always heads for the AT-AT's legs.

I played this one 3 times, just because of how much I like the look and movement of the AT-AT. One note I didn't see the ball the first time, but was able to beat the map without it. Thanks for playing and commenting on Death Star Approach:)

For any Star Wars/Portal fans after more Star Wars themed levels, check out of Jaz's maps :)

Star Wars Death Star Approach
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=82528718

Star Wars Death Star Exhaust Port
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=81668688