"newbie" question for crackers ;)

Hi... Couple quick questions, kind of new to this

1. How easy is it to decompile VB5/VB6 programs -- not that i want to do it, i want to protect my own apps.
(a) Apparently decompilers *do* exist (not easily available), but how many people actually do that? And how much of a threat is that?
(b) Would you recommended obfuscating the symbols (i.e., do vb .exes compiled into native code keep (which would be stupid) the symbol names, such as "form1", "checkBoxRegistration", etc, etc -- in which case -- is it REALLY really easy to get source from that? If so, looks like I might have to manually (arg! tedious) obfuscate)
(c) Which is better (to prevent reverse engineering), p-code or n-code? My understanding would be n-code, because p-code could be resolved to the actual instructions?

2. What would you say the *hardest* protector/packer/etc to unprotect/unpack/etc, is, and why? And how long would it take a skilled cracker to break, i.e., 30 minutes or less? (I.e., say armadillo, aspprotect, activelock, etc... apparently there are unpackers for all of these, but how easy is it for someone to figure out which one is being used and then crack it?)

3. I know I had some really other good questions, but unfortunately forget them now ...

4. I'm curious -- I've "seen" stuff for this (3rd party apps), but am more interested in knowing how it is coded... http i.p. spoofing (i.e., kind of like a proxy server, but not really, sending http requests)? not sure if someone would want to post it here, c++ (or VB?? ) but how would I go about finding out info about that,
as mr. google and a few other buddies of his don't seem to know.

thx!