Just been released as a Freeware on http://slion.net/view/Dev/DataTypeRegistry
Just publish v1.00(60) fixing a KERN-EXEC 3 crash upon deletion of the registry directory. Upgrade is strongly recommended.
Republished the same version but removed the self signed certificate as it would prevent installation on some phones even after Symbian Signed Online.
Just updated this so that it can be installed on Nokia Belle FP1 devices. Tested on Nokia 701.