I prefer installing third party software in the /usr/local directory so that I can keep it separate from the official install. This is purely personal preference, but I find it easier to backup just the /usr/local directory rather than the entire /usr directory. So I wrote a simple script that changes the install location of a SlackBuild to the /usr/local directory, I figured I'd share it in case anyone else was interested since I get a lot of information out of these forums.
if [ $CWD != $WORKDIR ]; then
ls|grep SlackBuild > file.txt
sed -e 's:/usr:/usr/local:g' $SOURCE > $TARGET
mv $TARGET $SOURCE
This will only work if there is only one SlackBuild in the directory since I have it automatically finding the name of the SlackBuild in the directory. If there is a better way of doing this by all means share, it doesn't look fancy but it gets the job done so I'm happy with it.