Start using portaputty instead of normal putty and link it with puttycm.
Puttycm supports sessions to be saved in its own Database files. You can use the Putty sessions you have saved already right inside putty.
You can have any number of databases which allow you to arrange Remote servers in folders and convenient namings.
I personally recommend creating Database with puttycm rather than using the sessions saved in putty which doesn't offer any option to create folders and saving sessions under that directory tree.
You can even save username/password to get it logged automatically and there is an option to pass commands to be run soon after login. I can't recommend this since some bug was found with these options.
Portaputty is a variant of putty which stores all the Configuration data in text files instead of MS Windows Registry entries thereby making customization and portability much easier than ever. For example you can set the default colour behaviour to set "Use system colours" just by editing the entry UseSystemColours=1 in .putty\sessions under the directory from where you are running portaputty.
puttycm is the Putty Connection Manager that gives a user interface where we can open multiple putty sessions in tabs and store sessions in a hierarchical directory tree structure. The saved sessions are being stored in DB files and the same can be exported to XML and can be transferred.
Both puttycm and portaputty are standalone executable. No more setup is required. Only thing is mention the full path to putty(here portaputty in our case) at first run of puttycm. Download portaputty here and puttycm can be downloaded from here
A typical Putty screen will appear as below with these PuttyCM and PortaPutty