It should be "safe" to attempt an installation from the .deb package using
Code: Select all
# dpkg -i *.deb
# apt-get install -f
Or use
gdebi, which will install any dependencies automatically.
If the commands fail then the package needs dependencies that are not available in wheezy and you should either give up, try to backport the package (search for "simple backports debian wiki" for the method) or upgrade to a newer release.
I suppose adding the experimental repository would be OK (it has a pin value of 1 by default) but in this case the package you want isn't there any more. Be aware though that packages are placed in experimental because they may have problems and users are advised not to install them at all; see the Debian wiki page for more on this.
Btw wheezy has reached EOL[1] so you might want to upgrade anyway.
[1]
https://wiki.debian.org/LTS/