As to the floats (I figure those are the values tagged as "number")

Yes. I tried to be consistent with other SOL tools, most of which call any kind of number just that, "number".

Flashplayer apparently stores its cookies in the same format, independently of the architecture the player is running on (which confirms what GrandFather wrote).

Thank you very much for this information. This probably means one can perform a reverse in the unpack depending on the value of $Config{byteorder}.

Do you have a link to a site which will make my flashplayer store numbers such as 726.127318273?

Currently not. But you can easily create your own, e.g. with the Sol editor (Win32 app, runs fine under Wine).