How to have both libcurl3 and libcurl4 installed at same time?

Eventually, I found better, universal solution for this. A guy on internet created CURL version which supports both CURL3 and CURL4. Available via. PPA. So far it works good. Unfortunately, I'm sure this version of CURL is not well known despite it solves problem which is very common to all Ubuntu users. So, I have to ask to share this knowledge in any form you like or prefer

https://launchpad.net/~xapienz/+archive/ubuntu/curl34

Looks like I totally over-brained it. I performed several steps and it works ! Thank you @guiverc , your "This is an alternative" brinks me idea of forcing program to accept libcurl3 or libcurl4

1. Open terminal in temporary folder. Use dpkg-deb -x /path/to/deb/file .
2. Open control.tar.gz. Navigate to ./control
3. Change line with dependency from libcurl3 to libcurl3 | libcurl4
4. Run dpkg-deb -b . name-of-new-deb-file.deb
5. Now run dpkg-deb -e path-to-deb-file-crated-in-step-4
6. Package get installed using temporary folder as root folder.
7. Create pentagram from small red colored stones. At full moon, sacrifice a goat with 666 stabs with knife while screaming "SUDO" at moon.
8. Launch file browser as root and copy all folders and files from temporary folder to real folders (temporary_folder/usr to /usr,temporary_folder/bin to /bin .etc)
9. All done, programm is installed.

I'm sure one of steps is not necessary but I don't know which one.