Tar is for taking many files and making 1 file from it. Sometimes it is combined with a compressor such as bzip or gzip. Tar is quite useful.
What errors are you encountering during installation? You didn't provide any information other than you dislike tar files. Reading the readme provided with macbuntu lists the steps for installing it. They seem to be pretty easy and straightforward.
1.2 Command line method
Open a terminal and type the following commands:
$ wget https://downloads.sourceforge.net/project/macbuntu/macbuntu-10.10/v2.3/Macbuntu-10.10.tar.gz -O /tmp/Macbuntu-10.10.tar.gz
$ tar xzvf /tmp/Macbuntu-10.10.tar.gz -C /tmp
$ cd /tmp/Macbuntu-10.10/
Where are you encountering an error?
I assume you're using this macbuntu: