2 questions on apt-get

[Ulrich Hansmair <ulrich@hansmair.m.uunet.de>]

hi freaks,

recently I´m using apt-get to install my potato. I think this way of
distributing debian is a great step into future and perfectly combines  the
abilities of the internet and free software. Debian should go this way.

Now to the questions. 
1. After apt-get update/upgrade I always get the standard kernel-image and
pcmcia-modules which overwrites my own compiled versions. How can I exclude
this packages from being upgraded?
2.apt-get upgrade gives the following message:

...
The following packages have been kept back:
dpkg-dev kernel-package perl perl-base
...

I wanna this packages be included in the normal upgrade-procedure. What is the
appropriate action?

I hope this questions are of common interest?

uli