First of all delete all codes of games you don't want to play this will give more space for other games you want to add later.
Second check the space that is left on your MC. (I don't recommend to store the codebreaker on MC, if you have it on MC move it to a usb-device)
If the above is done and you still have the problem with the day1 file maybe the file is corrupted but normally a corrupted .cbc file will lead to a crash/freeze.
PS2 SCPH-70004 V12 PAL + HDCOMBO + 160 GB Samsung HDD + OPL 0.9.1
PS2 SCPH-70004a V13 PAL Satin Silver
2 x Official Sony 8mb card +FMCB 1.8c + uLE 4.42b
Datel Max Memory 32mb card +FMCB 1.8b + uLE 4.42
Memor32 + Memento FW 1.2e