Hardtail or full suspension, you can manual any bike, with a little help from me. pardon the horrible drawings...
Step 1: Prep.
Make sure the bike fits you well before trying this. too big, good luck getting the wheel off the ground. too small, you go over backwards.
Step 2: Starting
OK, have your feet in a neutral position, have your strong foot in front. Stand in the way you would coast, standing partly over the handle bars.
Step 3: Doing It!
so after you are in neutral position, lean forward violently, then pull back on your handle bars. use your brakes to slow or speed yourself up. Remember: Manuals are NOT wheelies. wheelies use pedaling to move, manuals use momentum. you can also cheat by pedaling yourself up to manual position, but leaning is easier.
Step 4: The Manual
after you have fallen a few times you should have it down. Yee-Hah!