How To Divide Source File Into Smaller Files Without Exporting?

Hello Everyone,
I'm a beginner with PPro CS4 and to video editing in general. I've done a lot of Googling and searching of these forums to get an answer to this question, but I haven't found a clear answer. Here's my problem:
I have many hours of HDV footage shot over the past few years with a Canon HV30. This footage is on dozens of DV tape cassettes. I want to capture most of it to disk.
When I capture a tape to disk, I get a single large mpeg4 file. (PPro captures all HDV footage to mpeg4.) "Scene select" doesn't work with the HV30, so my only other way to make smaller capture files would be to set In/Out points with batch capture. But this would mean hours of fast-forwarding and reversing with the VCR-like controls on the camera to review all the tapes and set the points. I thought it might be FASTER to simply capture an entire tape in one operation, THEN review the captured tape within PPro (it's much faster using the scrubber), and dividing that file into smaller files within PPro, thereby avoiding all the mechanical fast-forwarding and rewinding on the camera itself.
But the only way I can find to do this seems to involve EXPORTING clips. Am I wrong to think that exporting a clip to a new file involves a degradation of the original mpeg4 source file? Or will there be no loss to the quality if I simply export to mpeg4 format?
It seems there should be an easy way to simply divide the original capture into smaller source files for later editing, without putting the footage through another generation of processing (exporting), which might entail some loss of quality. Or am I wrong about this?
(CS4 Master Suite, i7 3630k, 16GB RAM, C: 256GB SSD, D: 1T Setpoint F3, E: 1T Setpoint F3)

HDV footage is mpeg2 (whats in a number ). CS4 does not do scene detect you need to use HDV split for that.
http://strony.aster.pl/paviko/hdvsplit.htm.
You can run your already captured files through hdv split and it will chop the file into clips and off you go.

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>
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