(request) app to change apps apks to .bak

I tend to think that my phone slows down if I have 200+ apps installed on my phone. I understand that we can rename an apk to .bak and it will keep it on our phone, but won't b runable. So I think someone should make an app that will name them from apk to bak then back to apk. It would b nice if it worked with apps2sd (cyanogenmod) also. The reason wr should have an app instead of manually doing it is because when browsing the files we can't really see what app it is easily because they are in the weird form (com.google.earth.etc..)

The app already exists. Its called Root Explorer. Go in, find the apps, and rename them.