If you resize a partition, you have to format it and copy all the data back; as it says in the requester "All data will be lost".
If you can remember the EXACT start block and length of the old partitions, you can put that data back in and get all your data back, otherwise its format time i'm afraid.
If you boot a workbench disk, you should get icons for the partition saying ":NDOS" or ":

?" or such. Highlight one, and select "Format" from the "Icon" menu.
Use these settings; Fast File System, International Mode, *NO* dir cache, *NO* Trashcan.
If you had to use HDInstTools, i'm assuming that you don't have a workbench installer disk, so:
Then copy the contents of your workbench disk to the hard disk. Make a directory called "Fonts" on that partition, and copy the contents of the "Fonts" disk to it. Copy the contents of "Extras" across, as well. Then reboot.