You can have a close group of f.ex 4 targets, then use the TGP to make a MARK point on each target i.e MARK point A, B, C &D.
In the profile You can set the MARK point A as target.
Then You need to set the SPI on that target or just close to it, f.ex in the middleof that target group.
Then drop a single bomb and it will hit the target under the MARK point A.
Change the profile to the next MARK point f.ex B and reattack.
The above works fine for me.
I guess You can make serveral profiles, with each MARK point (A, B, C & D) and then select first profile, attack, select next profile, re-attack and so forth.
If Your quicj on the fingers You might be able to do this in a quick succession and thus hit serveral targets in one pass, if they are all close to the SPI.
Question is, if it is possible to give each bomb it´s own MARK point and then by dropping 4 bombs, hitting 4 targets in one attack run.
This would still require the SPI to be near all targets.