Have faith... my friend.
To clarify, I'm an athiest now but was an ex-catholic.
There are alot of ways you can slam them back in talks of the
faith, and it sucks that you can wack them in their strongest forte
- the bible.
1) The church which the bible speaks about is the Roman Catholic
church. Even the protestant bibles talk about the catholic church,
unless they really re-wrote the entire bible... Which is super
satanic!! wooh!
2) Do you know why they are called Protestants? Cause they
protested against the faith and broke away in 16th or 17th century
thru the 1st Protestant faith - The Lutherians.
There are now so many protestant faiths. Alamak... Do you know how
ridiculous is that? It's like I and you discuss about our religion,
if I don't follow your views, I can just set up my own NEW
protestant religion. Waoh!!! Do you see the Muslims/Buddhists doing
that? There are few thousands of protestant religions. MY
GOD!!!
3) It's against the faith to just mis-interpret the bible and start
a new version plus take out some books/chaps in them. Who are they
to play God and choose how the bible is interpreted? That's why
there's a central governing body to control the doctrines n
teachings.
4) The 1hr of mass is just the main compulsory thing. There's also
other areas and supplementary activities like activity grps,
P&W sessions, bible study etc. I never saw mass as boring. It's
solemn and ritualistic which I can appreciate. I prefer that to pop
music! 
5) Got so much to say... How about this? Pirated will never be
better than the original. =)
I've nothing against protestants who know how to respect other
people's faith. It's those who try to challenge me when I was a
catholic that I blasted them back till they had to go back to their
leaders with wounds asking for more refuting help. But really,
should religion be that?
Btw, I heard that CHC has the view that catholics pray to the
temple... haha!!! Gosh... Have you ever seen Linux dare to blast
Microsoft outright? tsk tsk....
For me, I've become an atheist cause my search for religion has
finally rested on the fact that if there's a god to pray to. It
should be me myself.
Cheers!
(But I still get a kick out of challenging mis-guided
protestants!)