I opened the CSWeapon.xml with Notepad, and changed the <Unlimited>0</Unlimited>: to <Unlimited>1</Unlimited>, in each of the Weapons listed in the <WeaponInfo> section. Like this:

<WeaponInfo>
        <Weapon>
            <Gun>SPPU-30</Gun>
            <Shell>GS-30-1 Bullet</Shell>
            <Unlimited>1</Unlimited>
            <Station name="LeftWingOuter" params="-2.55, 0, -0.2, 0, 0.095, 0, 1000" />
            <Station name="LeftWingInner" params="-2.35, 0, -0.2, 0, 0.095, 0, 1000" />
            <Station name="RightWingInner" params="2.55, 0, -0.2, 0, 0.095, 0, 1000" />
            <Station name="RightWingOuter" params="2.35, 0, -0.2, 0, 0.095, 0, 1000" />
            <Mode name="AUTO" shotrate="15" setshots="0" sequence="1+2+3+4" />
            <Mode name="X8" shotrate="30" setshots="30" sequence="1+2+3+4" />
            <DefaultMode>AUTO</DefaultMode>
        </Weapon>