Front?
I'm having trouble picturing this. Been too long since I worked on those.
You trying to replace cartridges only? You'll need a spring compressor. And yes, releasing the spring without one WILL mess you up, if that's what you mean.
They usually provide an 800 tech line for help if you need it.
Never mind, I just found it.
http://www.monroe.com/support/contact-info