how to manually fix dependency problems?

[Philip <subs@christiantena.net>]

I installed an external package.  This is the dependency list for the
package:-

dpkg-deb -I typo3-src-4.2_4.2.1-2_all.deb

 Depends: ttf-dejavu, libapache2-mod-php5 | libapache-mod-php5 |
php5-cgi, php5-cli, libjs-prototype (= 1.6.0)

However only libjs-prototype 1.6.0.2-4 is available, so I installed that
and used -force--depends on typo3-src

The software works fine, as the libjs-prototype has lots of symlinks to
1.6 and 1.60 included, but now my package management is messed up with
"typo3-src-4.2: Depends: libjs-prototype (= 1.6.0) but 1.6.0.2-4 is to
be installed E: Unmet dependencies." when I try to do anything.

What is the best way to fix this?

thanks, Philip