yesterday i can successfully boot my 98 from nvme!
0) (early) i convert my nvme gpt disk with installed win10 to mbr type, w/o data loss. unfortunatelly, i use already existed win10 recovery partition for new 98 copy - format as fat32 lba 545 mb at end of disk. it was wrong.
1) (yesterday) i move win10 ntfs part at disk end (cant delete it - there is value data), make new fat32 CHS part 500 mb at disk begin, format it and copy existed 98 folder from other disk.
2) at start i forget copy new build of SweetLow's driver, so use build w/o vsd, and after boot get many bsods "write error on disk C:" and garbage in file system. after SweetLow told about, i update driver, and get properly work 98 in protected mode. also verify booting in safe mode - here also all ok.
now i will try grow this partition to 8 and then to 20 gb, for new tests.