是否有从PHP5.2升级到PHP5.4的简单/快速修复?

My website goes off-line when I upgrade to PHP5.4 and my host 1&1 says they are doing away with 5.2 compatibility. I don't have the money to hire a professional to fix my website (one place quoted me at least 25 hours = $500), but I am just capable enough to insert a few lines of code in one of the files.

Is there a simple fix (workaround) to keep my website up and running that may not be technically correct or secure, but at least have it function until I can gather the money to have it done professionally?

For example, I saw this "MacGuyver-like" "fix" PHP 5.4 hasn't register_globals anymore - That's my workaround for this. --- which looks highly insecure to me.