The boolean isn't an script/addon now, it's just a basic modifier. what exactly is the issue you are having with it? you need two objects, touching. stick the modifier on one object, set the other object as the target. You'll probably need to hit apply to make it real for exporting the object as .x
As for the consolidate image... i've never actually used that in any version, it could be that it just didn't get converted over to the newer version, I'm not sure.
the save uv layout:
this is now under the UV menu in the UV/image editor window. at the very bottom of the list is 'export UV layout'. if you don't have this option, you can enable the addon in
file->user preferences->addons->import/export->import/export: uv layout
basically anything that was a script in 2.49 will be found in user preferences->addons if it exists in 2.6 you can enable/disable them from there and if you drop down the details for an addon it will show you where to find the command to use it.