If you're going to do the work yourself, why not just follow the upgrade path from 1.9.5 -> 2.2 -> 2.5? If you don't have much content the upgrade process shouldn't take more than a few hours. Just make sure you make backups of your database, content folder, and moodle folders.
Installing and upgrading help
Transfer content from 1.9.5 to 2.5
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